<?php

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/*

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* This file is part of the Monolog package.

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*

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* (c) Jordi Boggiano <j.boggiano@seld.be>

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*

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* For the full copyright and license information, please view the LICENSE

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* file that was distributed with this source code.

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*/

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/**

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* Monolog error handler

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*

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* A facility to enable logging of runtime errors, exceptions and fatal errors.

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*

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* Quick setup: <code>ErrorHandler::register($logger);</code>

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*

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* @author Jordi Boggiano <j.boggiano@seld.be>

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*/

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class Monolog_ErrorHandler

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{

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private $logger;

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private $previousExceptionHandler;

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private $uncaughtExceptionLevel;

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private $previousErrorHandler;

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private $errorLevelMap;

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private $fatalLevel;

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private $reservedMemory;

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private static $fatalErrors = array(E_ERROR, E_PARSE, E_CORE_ERROR, E_COMPILE_ERROR, E_USER_ERROR);

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public function __construct(Monolog_Psr_LoggerInterface $logger)

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{

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$this->logger = $logger;

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}

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/**

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* Registers a new ErrorHandler for a given Logger

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*

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* By default it will handle errors, exceptions and fatal errors

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*

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* @param Monolog_Psr_LoggerInterface $logger

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* @param array|false $errorLevelMap an array of E_* constant to LogLevel::* constant mapping, or false to disable error handling

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* @param int|false $exceptionLevel a LogLevel::* constant, or false to disable exception handling

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* @param int|false $fatalLevel a LogLevel::* constant, or false to disable fatal error handling

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*

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* @return Monolog_ErrorHandler

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*/

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public static function register(Monolog_Psr_LoggerInterface $logger, $errorLevelMap = array(), $exceptionLevel = null, $fatalLevel = null)

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{

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$handler = new self($logger);

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if ($errorLevelMap !== false) {

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$handler->registerErrorHandler($errorLevelMap);

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}

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if ($exceptionLevel !== false) {

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$handler->registerExceptionHandler($exceptionLevel);

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}

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if ($fatalLevel !== false) {

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$handler->registerFatalHandler($fatalLevel);

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}

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return $handler;

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}

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public function registerExceptionHandler($level = null, $callPrevious = true)

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{

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$prev = set_exception_handler(array($this, 'handleException'));

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$this->uncaughtExceptionLevel = $level;

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if ($callPrevious && $prev) {

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$this->previousExceptionHandler = $prev;

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}

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}

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public function registerErrorHandler(array $levelMap = array(), $callPrevious = true, $errorTypes = -1)

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{

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$prev = set_error_handler(array($this, 'handleError'), $errorTypes);

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$this->errorLevelMap = $this->arrayReplace($this->defaultErrorLevelMap(), $levelMap);

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if ($callPrevious) {

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$this->previousErrorHandler = $prev ? $prev : true;

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}

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}

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/**

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* Backport of PHP >=5.3 function array_replace

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*

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* @link http://www.php.net/manual/en/function.array-replace.php#94458

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*/

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private function arrayReplace(array $array, array $array1)

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{

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$args = func_get_args();

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$count = func_num_args();

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for ($i = 0; $i < $count; ++$i) {

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if (is_array($args[$i])) {

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foreach ($args[$i] as $key => $val) {

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$array[$key] = $val;

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}

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} else {

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trigger_error(

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__FUNCTION__.'(): Argument #'.($i + 1).' is not an array',

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E_USER_WARNING

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);

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return null;

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}

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}

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return $array;

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}

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public function registerFatalHandler($level = null, $reservedMemorySize = 20)

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{

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register_shutdown_function(array($this, 'handleFatalError'));

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$this->reservedMemory = str_repeat(' ', 1024 * $reservedMemorySize);

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$this->fatalLevel = $level;

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}

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protected function defaultErrorLevelMap()

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{

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$map = array(

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E_ERROR => Monolog_Psr_LogLevel::CRITICAL,

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E_WARNING => Monolog_Psr_LogLevel::WARNING,

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E_PARSE => Monolog_Psr_LogLevel::ALERT,

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E_NOTICE => Monolog_Psr_LogLevel::NOTICE,

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E_CORE_ERROR => Monolog_Psr_LogLevel::CRITICAL,

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E_CORE_WARNING => Monolog_Psr_LogLevel::WARNING,

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E_COMPILE_ERROR => Monolog_Psr_LogLevel::ALERT,

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E_COMPILE_WARNING => Monolog_Psr_LogLevel::WARNING,

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E_USER_ERROR => Monolog_Psr_LogLevel::ERROR,

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E_USER_WARNING => Monolog_Psr_LogLevel::WARNING,

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E_USER_NOTICE => Monolog_Psr_LogLevel::NOTICE,

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E_STRICT => Monolog_Psr_LogLevel::NOTICE,

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E_RECOVERABLE_ERROR => Monolog_Psr_LogLevel::ERROR,

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);

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if (version_compare(PHP_VERSION, '5.3', '>=')) {

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$map[E_USER_DEPRECATED] = Monolog_Psr_LogLevel::NOTICE;

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$map[E_DEPRECATED] = Monolog_Psr_LogLevel::NOTICE;

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}

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return $map;

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}

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/**

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* @private

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*/

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public function handleException($e)

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{

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$this->logger->log(

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$this->uncaughtExceptionLevel === null ? Monolog_Psr_LogLevel::ERROR : $this->uncaughtExceptionLevel,

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'Uncaught exception',

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array('exception' => $e)

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);

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if ($this->previousExceptionHandler) {

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call_user_func($this->previousExceptionHandler, $e);

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}

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}

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/**

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* @private

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*/

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public function handleError($code, $message, $file = '', $line = 0, $context = array())

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{

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if (!(error_reporting() & $code)) {

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return;

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}

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$level = isset($this->errorLevelMap[$code]) ? $this->errorLevelMap[$code] : Monolog_Psr_LogLevel::CRITICAL;

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$this->logger->log($level, self::codeToString($code).': '.$message, array('code' => $code, 'message' => $message, 'file' => $file, 'line' => $line));

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if ($this->previousErrorHandler === true) {

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return false;

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} elseif ($this->previousErrorHandler) {

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return call_user_func($this->previousErrorHandler, $code, $message, $file, $line, $context);

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}

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}

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/**

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* @private

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*/

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public function handleFatalError()

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{

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$this->reservedMemory = null;

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$lastError = error_get_last();

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if ($lastError && in_array($lastError['type'], self::$fatalErrors)) {

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$this->logger->log(

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$this->fatalLevel === null ? Monolog_Psr_LogLevel::ALERT : $this->fatalLevel,

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'Fatal Error ('.self::codeToString($lastError['type']).'): '.$lastError['message'],

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array('code' => $lastError['type'], 'message' => $lastError['message'], 'file' => $lastError['file'], 'line' => $lastError['line'])

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);

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}

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}

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private static function codeToString($code)

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{

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switch ($code) {

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case E_ERROR:

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return 'E_ERROR';

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case E_WARNING:

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return 'E_WARNING';

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case E_PARSE:

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return 'E_PARSE';

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case E_NOTICE:

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return 'E_NOTICE';

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case E_CORE_ERROR:

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return 'E_CORE_ERROR';

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case E_CORE_WARNING:

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return 'E_CORE_WARNING';

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case E_COMPILE_ERROR:

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return 'E_COMPILE_ERROR';

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case E_COMPILE_WARNING:

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return 'E_COMPILE_WARNING';

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case E_USER_ERROR:

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return 'E_USER_ERROR';

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case E_USER_WARNING:

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return 'E_USER_WARNING';

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case E_USER_NOTICE:

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return 'E_USER_NOTICE';

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case E_STRICT:

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return 'E_STRICT';

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case E_RECOVERABLE_ERROR:

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return 'E_RECOVERABLE_ERROR';

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case E_DEPRECATED:

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return 'E_DEPRECATED';

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case E_USER_DEPRECATED:

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return 'E_USER_DEPRECATED';

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}

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if (version_compare(PHP_VERSION, '5.3', '>=')) {

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switch ($code) {

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case E_DEPRECATED:

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return 'E_DEPRECATED';

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case E_USER_DEPRECATED:

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return 'E_USER_DEPRECATED';

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}

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}

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return 'Unknown PHP error';

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}

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}

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